Deb's Escaflowne Gallery
http://www.jersey.net/~dnilsen/cels/
May not be the largest on the net but is one of 
the best organised with a stunning collection of 
Folken cels. (She also has a nice collection of 
Bebop cels).

Bebop galleries are well spread out througout the 
net. Many collectors have a few....(myself 
included). Few collectors have large amounts (the 
cost may be prohibitive) The Japanese collector 
Micke as well as the best Kenshin OVA collection 
ever has a fantastic collection of cels of Faye 
Valentine.

Dragonball Z. Not my cup of tea... Pass